Conf42: Python 2021

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Reproducible Builds with Bazel

Gaspare Vitta
CI/CD Engineer for Autonomous Driving @ FCA Fiat Chrysler Automobiles

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If you run two builds with the same source code and the same commit but on two different machines, do you expect to get the same result? Well, in most cases you will not!

In this talk, we’ll identify sources of non-determinism in most build processes and look at how Bazel can be used to create reproducible, hermetic builds. We’ll then create a reproducible Flask application that can be built with Bazel so that the Python interpreter and all dependencies are hermetical.

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